The best option.. for what? To live in? To invest in? To look at? Besides, isn't it incredibly personal? What's the best option for someone, might be a poor option for someone else.
The best option to invest in and do business in. If you want to make a deal, and are interested in consistent rule of law, and enforceability of the contracts and juridical outcomes, then you have an interest in doing it in the US.
This is in the context of the USD maintaining its relative value.
Everything is cyclical, and no one truly expected the US to rise indefinitely. Perhaps we're past the peak now.